Xometry's Manufacturing Partner Network makes thousands of machines available to make your part at the click of a mouse. Since the minimum requirement to machine a part is a solid CAD file, we offer these general tolerances and guidelines (also found in our Manufacturing Standards). As always, we have free online Design Guides th go more in-depth on our manufacturing services.
CNC Machining
- +.005”/-.005” local tolerances across most geometries in metals, +/- 0.010" for plastics. Will vary for large parts, specifically when holding flatness over large parts after heat treatment.
- Finish requirements for “As Milled” finish will have a minimum 125 surface finish for CNC parts.
- All fabricated parts have a 0.010” dimensional and 1° angular tolerance.
- Tapped holes not explicitly called out as Features on the quoted CAD model may be machined to the diameters specified in that model.
- No surface treatments (e.g. anodize, bead blast, iridite, powder coat, etc.) will be applied unless you have paid for them and we have specifically acknowledged them.
Sheet Metal
- +/- 0.010” – 0.020” is typical and highly dependent on geometric features like bends and weldments.
- Xometry recommends staying above 14 gauge for best performance and designing with common gauge thickness.
As a general rule, please make sure all metal CNC parts have a minimum wall thickness of 0.030". For plastics, the minimum wall thickness should be at least 0.060". If our team finds a manufacturability issue we may put the project on hold and reach out for some clarification or a design change.
Xometry's instant quoting platform allows you to specify even tighter tolerances as well as custom features. If you have any questions on your project, please contact us. Please see our Manufacturing Standards for the full details on Xometry's standards for Sheet Metal.